/*
 * Copyright 2022-2024 Ponfee (http://www.ponfee.cn/)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.ponfee.disjob.alert.sender;

import java.util.Collections;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;

/**
 * Alert recipient mapper
 *
 * @author Ponfee
 */
public class AlertRecipientMapper {

    /**
     * Converts job configured recipients to message channel recipients
     *
     * @param alertRecipients the alert recipients
     * @return recipients Map[origin-recipient, channel-recipient]
     */
    public Map<String, String> mapping(Set<String> alertRecipients) {
        if (alertRecipients == null) {
            return null;
        }
        if (alertRecipients.isEmpty()) {
            return Collections.emptyMap();
        }
        return alertRecipients.stream().collect(Collectors.toMap(Function.identity(), Function.identity()));
    }

}
